<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./lib/jquery.js"></script>
    <style>
        html,
        body {
            margin: 0;
            padding: 0;
            overflow: hidden;
        }

        #angel {
            position: absolute;
        }
    </style>
</head>

<body>
<img src="./angel.gif" alt="" id="angel"/>

<script>
    $(function () {
        // 1. 获取到图片
        var angel = $('#angel')
        // 步骤1. 定义节流阀
        var timer = null
        // 2. 绑定 mousemove 事件
        $(document).on('mousemove', function (e) {
            // 步骤3：判断节流阀是否为空
            if (timer) {
                return
            }
            // 3. 设置图片的位置
            // 步骤2：开启延时器
            timer = setTimeout(function () {
                $(angel).css('top', e.pageY + 'px').css('left', e.pageX + 'px')
                console.log('ok')
                timer = null
            }, 16)

        })
    })
</script>
</body>

</html>
